在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

clone() 方法在 Request interface creates a copy of the current Request 对象。

clone() throws a TypeError if the response Body has already been used. In fact, the main reason clone() exists is to allow multiple uses of Body objects (when they are one-use only.)

If intend to modify the request, you may prefer the Request 构造函数。

句法

var newRequest = request.clone();
					

参数

None.

返回值

A Request object, which is an exact copy of the Request that clone() was called on.

范例

In the following snippet, we create a new request using the Request.Request() constructor (for an image file in the same directory as the script), then clone the request.

var myRequest = new Request('flowers.jpg');
var newRequest = myRequest.clone(); // a copy of the request is now stored in newRequest
					

规范

规范	状态	注释
Fetch The definition of 'clone' in that specification.	实时标准	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
clone	Chrome 42 42 41 Disabled Disabled From version 41: this feature is behind the Experimental Web Platform Features preference. To change preferences in Chrome, visit chrome://flags.	Edge 14	Firefox 39 39 34 Disabled Disabled From version 34: this feature is behind the dom.fetch.enabled preference. To change preferences in Firefox, visit about:config.	IE No	Opera 29 29 28 Disabled Disabled From version 28: this feature is behind the Experimental Web Platform Features preference.	Safari No	WebView Android No	Chrome Android No	Firefox Android No	Opera Android 29 29 28 Disabled Disabled From version 28: this feature is behind the Experimental Web Platform Features preference.	Safari iOS No	Samsung Internet Android No

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

用户必须明确启用此特征。

用户必须明确启用此特征。

另请参阅

• ServiceWorker API
• HTTP access control (CORS)
• HTTP

元数据

• 最后修改： Nov 11, 2019

相关话题

1. Request
2. 构造函数

   1. Request()
3. 特性

   1. body
   2. bodyUsed
   3. cache
   4. context
   5. credentials
   6. destination
   7. headers
   8. integrity
   9. method
   10. mode
   11. redirect
   12. referrer
   13. referrerPolicy
   14. url
4. 方法

   1. arrayBuffer()
   2. blob()
   3. clone()
   4. formData()
   5. json()
   6. text()